text: drop unused field on line

Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>

text/gotext.go

@@ -80,7 +80,6 @@ type line struct {
 	// runeCount is the number of text runes represented by this line's runs.
 	runeCount int
 
-	xOffset fixed.Int26_6
 	yOffset int
 }
 

text/shaper.go

@@ -327,7 +327,7 @@ func (l *Shaper) NextGlyph() (_ Glyph, ok bool) {
 		}
 		glyph := Glyph{
 			ID:      g.id,
-			X:       align + line.xOffset + run.X + runOffset,
+			X:       align + run.X + runOffset,
 			Y:       int32(line.yOffset),
 			Ascent:  line.ascent,
 			Descent: line.descent,